Exhaust gas recovery method and exhaust gas recovery equipment

Abstract

The present invention provides an exhaust gas recovery method and exhaust gas recovery equipment that can properly recover exhaust gas, reduce the adhesion of splash particles at high temperatures of 1000°C or higher to the dust collector, and reduce the scattering of splash particles around the torpedo car. [Solution] The exhaust gas recovery method recovers exhaust gas V discharged to the outside from a furnace opening 22 formed in a torpedo car 20 containing molten iron M using a dust collector 30 that includes a hood 40 covering the furnace opening 22 and a duct 50 communicating with the hood 40. The method involves adjusting the center position 42a of the hood opening 42 located at the end of the hood 40 on the furnace opening 22 side and the center position 22a of the furnace opening 22 to be the same position in the vertical direction, and adjusting the horizontal distance E between the center position 53a of the plane when the end face on the hood 40 side of the duct space surrounded by the wall 51 of the duct 50 is virtually considered a plane and the center position 22a of the furnace opening 22 to be within the range of 0m or more and 0.6m or less.

Claims

1. A method for recovering exhaust gas discharged to the outside from a furnace opening formed in a torpedo car that contains molten iron, by a dust collection device including a hood covering the furnace opening and a duct communicating with the hood, An adjustment step to adjust the positions of the hood and the duct with respect to the position of the furnace opening, The blowing process involves inserting an injection lance into the molten iron in the torpedo car and blowing an oxidation source into the molten iron through the injection lance, The system includes a recovery step in which the exhaust gas discharged to the outside from the furnace opening is recovered by the dust collector, An exhaust gas recovery method comprising the adjustment step of adjusting the center position of the hood opening located at the end of the hood on the furnace opening side and the center position of the furnace opening to be the same position in the vertical direction, and adjusting the horizontal distance between the center position of the plane (when the end face on the hood side of the duct space enclosed by the duct wall is virtually considered as a plane) and the center position of the furnace opening to be within the range of 0 m or more and 0.6 m or less.

2. The exhaust gas recovery method according to claim 1, wherein the interval is the interval in the direction of travel of the torpedo car.

3. The exhaust gas recovery method according to claim 1, wherein in the adjustment step, the central position of the insertion port formed in the hood for inserting the injection lance and the central position of the furnace opening are adjusted to be different positions in the horizontal direction.

4. The exhaust gas recovery method according to claim 1, wherein the duct includes a bent portion.

5. An exhaust gas recovery system for recovering exhaust gas generated from molten iron, A torpedo car having a furnace opening for discharging the exhaust gas to the outside and housing the molten iron inside, The system includes a hood covering the furnace opening and a duct communicating with the hood, and a dust collector for recovering the exhaust gas. An exhaust gas recovery system in which the center position of the hood opening located at the end of the hood on the furnace opening side and the center position of the furnace opening are adjusted to be the same vertically, and the horizontal distance between the center position of the plane when the end face of the duct space enclosed by the duct wall on the hood side is virtually considered as a plane and the center position of the furnace opening is adjusted to be within the range of 0 m or more and 0.6 m or less.

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